Solid Sphere Model pros and cons

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Classify this reaction: 2al+n2-> aln.

What is the percent by mass of oxygen in fe2o3